[25.14] Long-look observation of SS 433 by ASCA

A long-look observation of SS 433 by ASCA was performed in
March-April 2000 covering most of its whole orbital phases.
One of the major motivations of this observation is the
search for evidence of supercritical accretion, which often
has been proposed to be the source of the jet production in
this system. We map the distribution of thick absorbing
matter in the binary system, and study the mass loss
associated with the supercritical accretion flow. In fact we
found that the X-ray flux was more variable in the soft band
below 2 keV, implying inhomogeneous distribution of absorber
within the binary system. In addition, the eclipse profile
was wide and shallow in the soft band. It can be explained
either by the excess absorption around the companion star,
or spatialy extended soft emission source around the compact
object.